Which term represents a form of energy? (1) heat (2) degree (3) kilojoule (4) temperature

The minimum number of fixed reference points required to establish the Celsius temperature scale tor a thermometer is: (1) 1, (2) 2, (3) 3, (4) 4.

Which kind of energy is stored in a chemical bond? (1) potential energy (2) kinetic energy (3) activation energy (4) ionization energy

Which of the following is NOT a form of energy? a. light b. oxygen c. heat d. electricity

The energy that is associated with the motion of an object is called?

The energy associated with the motion of particles in a substance is called?

Which occurs as a substance melts? (1) It changes from a solid to a liquid and heat is absorbed. (2) It changes from a solid to a liquid and heat is released. (3) It changes from a liquid to a solid and heat is absorbed. (4) It changes from a liquid to a solid and heat is released.

The average kinetic energy of water molecules increases when (1) $\mathrm{H}_{2} \mathrm{O}(\mathrm{s})$ changes to $\mathrm{H}_{2} \mathrm{O}(\ell)$ at $0^{\circ} \mathrm{C}$ (2) $\mathrm{H}_{2} \mathrm{O}(\ell)$ changes to $\mathrm{H}_{2} \mathrm{O}(s)$ at $0^{\circ} C$ (3) $\mathrm{H}_{2} \mathrm{O}(\ell)$ at $10^{\circ} \mathrm{C}$ changes to $\mathrm{H}_{2} \mathrm{O}(\ell)$ at $20^{\circ} C$ (4) $\mathrm{H}_{2} \mathrm{O}(\ell)$ at $20^{\circ} \mathrm{C}$ changes to $\mathrm{H}_{2} \mathrm{O}(s)$ at $10^{\circ} \mathrm{C}$

When 25.0 grams of water are cooled from $20.0^{\circ} \mathrm{C}$ to $10.0^{\circ} \mathrm{C}$, the number of joules of heat energy released is (1) 42 (2) 105 (3) 840 (4) 1050

Quartz, SiO2, contains 46.7% silicon. What mass of silicon is present in 348 g of quartz?

Which of the following is a chemical change?

(a) Water evaporates.
(b) Ice melts.
(c) Rocks are ground to sand.
(d) A penny tarnishes.

Which unit is used to express the amount of energy absorbed or released during a chemical reaction? (1) degree (2) torr (3) gram (4) joule

The Earth receives energy from the Sun by?

Temperature is proportional to the average kinetic energy of particles in an object. Thus, an increase in temperature results in a(n) a. increase in mass. b. decrease in average kinetic energy. c. increase in average kinetic energy. d. decrease in mass.